ERC20令牌从事务哈希传输的信息 [英] ERC20 Tokens Transferred Information from Transaction Hash

问题描述

EtherScan提供用于交易详细信息的API它是名为eth_getTransactionByHash的Geth/Parity代理API的一部分，但我无法获取传输了什么ERC20令牌以及传输了多少令牌的信息。

我需要令牌详细信息和借助事务哈希传输的令牌数量。

推荐答案

您使用的接口错误。

要获取ERC20转账的信息，您需要交易收据，因为转账信息记录在转账事件日志中。您应该使用eth_getTransactionReceipt。

这将为thistx：

提供如下响应

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "blockHash": "0xc5e5a515898983d1370d40b03fc05ae08be861af746a1577796153a149a1bb20",
    "blockNumber": "0x5ff5dd",
    "contractAddress": null,
    "cumulativeGasUsed": "0xe85fb",
    "from": "0xd7afd4441fccc118b9207b0e136f4ef9319b3c79",
    "gasUsed": "0x9034",
    "logs": [
      {
        "address": "0x0d8775f648430679a709e98d2b0cb6250d2887ef",
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x000000000000000000000000d7afd4441fccc118b9207b0e136f4ef9319b3c79",
          "0x00000000000000000000000069d9e9aff57ec73582ad1ce441726dba7ea78fe0"
        ],
        "data": "0x0000000000000000000000000000000000000000000001054aefee8ba6d00000",
        "blockNumber": "0x5ff5dd",
        "transactionHash": "0x3265c1461d3f167c756fbc062ae3a2dc279b44a9c3ca2194271d4251cd0c1655",
        "transactionIndex": "0x1b",
        "blockHash": "0xc5e5a515898983d1370d40b03fc05ae08be861af746a1577796153a149a1bb20",
        "logIndex": "0xa",
        "removed": false
      }
    ],
    "logsBloom": "0x04000000002000000200000000000000002000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000008000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000200010000000000000000000000000000000000000000000000100000000000000000200000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "status": "0x1",
    "to": "0x0d8775f648430679a709e98d2b0cb6250d2887ef",
    "transactionHash": "0x3265c1461d3f167c756fbc062ae3a2dc279b44a9c3ca2194271d4251cd0c1655",
    "transactionIndex": "0x1b"
  }
}

其中，此日志部分非常重要。

ERC20传输日志的格式为Transfer(address from, address to, uint256 value)。当您获取Transfer(address,address,uint256)的keccak散列时，您将获得主题的0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef，如上面的响应所示。

日志中接下来两个值分别是和地址，对于Eth来说是正常的(直到32个字节填充为零)。最后，日志中的data是传输的ERC20令牌的值(本例中为BAT)。

发出日志的address，在本例中为令牌合同。然后，您可以使用eth_call接口读取令牌信息，从而从该合同中读取令牌符号、名称和小数。

这篇关于ERC20令牌从事务哈希传输的信息的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！